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IS 1570 (Part 2/Sec 1) 40C8 vs BS 970 (Part 1) 040A12

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 2/Sec 1) 40C8 (IS 1570 (Part 2/Sec 1):1979) and BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. IS 1570 (Part 2/Sec 1) 40C8 is typically used for hardened and tempered parts, cold rolled medium and high carbon strip and hot rolled bars for bright bars and machined parts (the standard links this grade to is 5517, is 7226, is 7283), while BS 970 (Part 1) 040A12 is commonly used for as-rolled, or as-rolled and softened, steel (section two). IS 1570 (Part 2/Sec 1) 40C8 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 2/Sec 1) 40C8 vs BS 970 (Part 1) 040A12 is a 85.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With IS 1570 (Part 2/Sec 1) 40C8:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 080A20 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045A10 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
85.7%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property IS 1570 (Part 2/Sec 1) 40C8 BS 970 (Part 1) 040A12
Standard IS 1570 (Part 2/Sec 1):1979 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.35-0.45 0.10-0.15
Mn (%) 0.60-0.90 0.30-0.50
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 2/Sec 1) 40C8 BS 970 (Part 1) 040A12
Tensile Strength 580-680 MPa Not specified
Elongation >=18% Not specified
Typical Applications
IS 1570 (Part 2/Sec 1) 40C8
Hardened and tempered parts, cold rolled medium and high carbon strip and hot rolled bars for bright bars and machined parts (the standard links this grade to IS 5517, IS 7226, IS 7283)
BS 970 (Part 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
Can IS 1570 (Part 2/Sec 1) 40C8 Be Substituted With BS 970 (Part 1) 040A12?
IS 1570 (Part 2/Sec 1) 40C8 and BS 970 (Part 1) 040A12 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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IS 1570 (Part 2/Sec 1) 40C8
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BS 970 (Part 1) 040A12
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Frequently Asked Questions
What is the difference between IS 1570 (Part 2/Sec 1) 40C8 and BS 970 (Part 1) 040A12?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 1570 (Part 2/Sec 1) 40C8 be substituted with BS 970 (Part 1) 040A12?
IS 1570 (Part 2/Sec 1) 40C8 and BS 970 (Part 1) 040A12 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.